Extensive use of corn hybrids in Indonesia started in 1980 became expensive to farmers. In fact, the hybrids became obsolete and were replaced with the new ones. The obsolete hybrids, however, expressed superior traits toward detrimental hindrances in situ. The traits were identified, the obsolete hybrids were worthy to select for being local genetic sources (LGS) in a corn breeding program. The research was done to identify the LGS collected from Padang, Palembang, Jogjakarta, West Kalimantan and Lampung. In 2018 the LGS were planted in two rows and open-pollinated among themselves. The seeds were harvested separately to make female lines. A synthetic line was made by mixing 100 seeds of each female line. In 2019 the six lines: five female and one synthetic, and Pioneer36 (P36) F1-hybrid as control were planted in a randomized complete block design with 3 replicates. The data were collected for traits: plant height, leaf number plant⁻¹, time to tasseling, time to silking, ear length, ear diameter, 100 seed weight and seed yield m⁻². The data were variance-analysed and Tukey’s HSD was applied to separate and group the lines. A dendrogram was constructed to decide lines suitable to recombine. The result indicated that the Padang, Palembang, Lampung and Synthetic lines could be used as the male parents to recombine with the Jogjakarta and West Kalimantan lines. The Tukey’s HSD and dendrogram statistics could be useful to identify line superior and pairing appropriate lines as parents in a breeding program.

印度尼西亚于 1980 年开始广泛使用玉米杂交种，这对农民来说变得昂贵。事实上，混合动力车已经过时并被新车型取代。然而，过时的杂交种表现出对原位有害障碍的优越性状. 鉴定了这些性状，过时的杂种值得选择作为玉米育种计划中的本地遗传资源 (LGS)。该研究旨在鉴定从巴东、巨港、日惹、西加里曼丹和楠榜收集的 LGS。2018 年，LGS 种植成两行，并在它们之间进行开放授粉。单独收获种子以制备雌性系。通过混合每个雌性品系的 100 粒种子制成合成品系。2019 年，6 个品系：5 个雌性和 1 个合成品系，以及作为对照的 Pioneer36 (P36) F1 杂交种以随机完整区组设计种植 3 个重复。收集性状的数据：株高、植株叶数^-1、抽雄时间、抽丝时间、穗长、穗直径、100粒重和种子产量 m ^-2. 对数据进行方差分析，并应用 Tukey 的 HSD 来分离和分组这些线。构建树状图以确定适合重组的系。结果表明，Padang、Palembang、Lampung 和 Synthetic 系可以作为父本与 Jogjakarta 和 West Kalimantan 系进行重组。Tukey 的 HSD 和树状图统计可用于在育种计划中识别优良品系和配对合适的品系作为亲本。